21210202002 has 16 divisors (see below), whose sum is σ = 46276804512. Its totient is φ = 6427333920.

The previous prime is 21210201989. The next prime is 21210202007. The reversal of 21210202002 is 20020201212.

21210202002 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (21210202007) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 160683283 + ... + 160683414.

It is an arithmetic number, because the mean of its divisors is an integer number (2892300282).

Almost surely, 2^21210202002 is an apocalyptic number.

21210202002 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

21210202002 is an abundant number, since it is smaller than the sum of its proper divisors (25066602510).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21210202002 is a wasteful number, since it uses less digits than its factorization.

21210202002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 321366713.

The product of its (nonzero) digits is 32, while the sum is 12.

Adding to 21210202002 its reverse (20020201212), we get a palindrome (41230403214).

The spelling of 21210202002 in words is "twenty-one billion, two hundred ten million, two hundred two thousand, two".